Sellwood Pit, Ishpeming, Marquette iron range, Marquette Co., Michigan, USA
This specimen is composed of banded layers of black Goethite and iron stained massive Quartz. The top surface of the specimen is black botryoidal Goethite with a high luster. Each of the spheres is composed of very small plate like crystals. The specimen is in fairly good condition but part of the top surface has a reddish overcoat.